A percentage is just a fraction out of one hundred, but the three questions people actually ask — “what is X% of Y”, “X is what percent of Y”, and “what is the percent change from X to Y” — trip a lot of us up. This calculator handles all three: pick the mode, enter your two numbers, and the answer updates as you type.
Percentage Calculator
Reviewed
ResultUpdates as you type
Result30
Solve any percentage problem — percent of a number, what percent, and percent change.
Pick the type of percentage question you have and fill in the two known values.
Formula
Percent of
result = (X / 100) × YWhat percent
result = (X / Y) × 100Percent change
result = (Y − X) / |X| × 100Frequently asked questions
How do I find a percentage increase?
Use the "percentage change" mode with the original value as X and the new value as Y. A positive result is an increase.